1.

focal length of objective eye piece an inverting lens of terrestrial telescope are 20 cm , 10 cm , 5 cm respectively . length of the tube containing these lenses at normal adjustment is(1) 30 cm (2) 35 cm (3) 50 cm (4) 40 cm

Answer» focal length of objective eye piece an inverting lens of terrestrial telescope are 20 cm , 10 cm , 5 cm respectively . length of the tube containing these lenses at normal adjustment is
(1) 30 cm
(2) 35 cm
(3) 50 cm
(4) 40 cm


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